1. Generally speaking, it should be done when the fruit is as big as soybean and can distinguish between good and bad, sooner rather than later. Pests and diseases, abnormal fruits, poor fertilization, seedless small fruits, fruits with inward heads and fruits sandwiched in the middle of fruit ears can be removed, and 30-50 grains are left per ear.

2. After cutting off the spike and shaping the inflorescence, the number of fruit grains sitting in the inflorescence will generally decrease a lot, but sometimes in order to produce neat ear and huge fruit grains, too many fruit grains have to be removed.

3. After fruit thinning, the single grain weight is kept at 10 ~ 20g, and the single ear weight is kept at 500 ~ 600g.

4. It is best to thin the fruit for the first time when it is the size of mung bean, and then thin it for the second time after the fruit is set (when the fruit reaches the size of soybean). Fruit thinning can be combined with coring and inflorescence shaping, which can achieve ideal results.